function successAlert(msg) {
    layer.msg(msg, {
        time: 20000,
        btn: ['继续操作', '返回列表'],
        success: function(layero){
        var btn = layero.find('.layui-layer-btn');
        btn.find('.layui-layer-btn1').attr({
            href: 'javascript:history.back(-1);'
        });
    }
    });
}



function loader(url) {

}